I've noticed that there are some codes with "base64" written in the URLs from the chibi images from the official DDLC page. I can't seem to decode them, but i think someone here should know how to decode better than me.
I can't put the URLs here, cuz they are too big. But i can just put the official page link, so here it is:
Just go to the bottom of the home page and you'll find the chibi images for you to open.